Cutting – With receptacle or support for cut product
Patent
1996-12-17
1998-11-24
Rachuba, M.
Cutting
With receptacle or support for cut product
83269, 83371, 83560, 355408, G03B 2700, B26D 700, B26D 520
Patent
active
058393366
ABSTRACT:
In a paper-punching device for use in an image-forming apparatus, the rear edge of a sheet of paper that is being transported through a transport guide is detected by the photosensor. After a predetermined time has passed since the detection, a punching device is activated. At this time, a punching member is depressed downward, and a punching blade attached to its top penetrates through the sheet of paper, thereby forming a punch hole. Even during the punching operation, transport rollers continue to rotate. Therefore, when the sheet of paper is caught by the punching blade, the transport rollers are allowed to slip a predetermined amount with respect to the paper. For this reason, at least one of the transport rollers is made of a foamed material. With this arrangement, since the punching operation is carried out on the rear side of the sheet of paper, it becomes possible to reduce the occurrence of paper jams even if sheets of paper are transported in succession. Further, the punching operation is carried out while the paper is being transported; this makes it possible to provide a high-speed operation. Further, even if the sheet of paper is caught by the punching blade, it is not damaged because of the slip that is provided.
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Hirai Masashi
Okumura Masafumi
Taka Kyousuke
Uno Kinji
Yamanaka Toshio
Pryor Sean A.
Rachuba M.
Sharp Kabushiki Kaisha
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